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Discussion Starter #1
I am considering whether or not to use a HTPC in my home theater. One big issue is aspect ratio control. Is there any way of using a HTPC to take an anamorphic image from a DVD and stretch it to its proper 1.85 or 2.35 aspect ratio such that the full panel resolution of a 4:3 projector is utilized (i.e., can it perform the function of a panamorph or ISCO lens)? Can a HTPC be used to expand letterboxed movies to fill a wide aspect ratio screen? In other words, if I were to use a 4:3 projector with a 2.35 screen can I set up the projector so that it maintains constant height while switching between different aspect ratios?
 

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What you're really asking for is to change the width of the projected image, and there's no way for an HTPC to do that. You need an anamorphic lens for that.


Assuming you get an anamorphic lens, the HTPC will work just find with it. What you would to is uncheck the 'keep aspect ratio' option in the DVD software so that you end up with a fullscreen 4:3 image where everything is tall and skinny. Then, you use the anamorphic lens to stretch the projected image back out to it's proper aspect ratio.
 

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Hi there


Basically, you can do everything you want.


I'm using PowerDVD with a (always) 16:9 screen size (no memories, my fptv always sends this ratio).


Desktop resolution matches this ratio but this is just a goodie, notmandatory.


Full frame stuff is centered in the middle of the 16:9 screen like this http://boostercorp.com/images/4-3_squeeze.jpg


Anamorphic stuff (whatever the ratio encoded .. 1.85 etc..) shows good also http://boostercorp.com/images/16-9_anamorph.jpg or http://boostercorp.com/images/2-35_16-9.jpg


Non anamorphic ltbx stuff requires a flag to be set but yes, it simulates anamorphic stuff.


Source is http://boostercorp.com/images/4-3_letterbox_16-9.jpg and result is http://boostercorp.com/images/16-9_anamorph.jpg


For analog sources, Dscaler has an intuitive, easy to use aspect ratio module that will do all that and even more.


Note ; images courtesy of Boostercorp
 

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Discussion Starter #5
For a HTPC wannabe, this seems like a lot of work. I would like to keep my system as transparent to use as possible. Having to fiddle with an anamorphic lens which must be removed whenever viewing non-anamorphic material seems like a pain. I suppose my best bet is to get a 16:9 projector which I can feed with a HTPC.
 

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Zoomplayer 2.12 with IRE 0 reset button can be downloaded for free from www.inmatrix.com . It'll let you resize, stretch (width, height, or both), zooms/unzooms any DVD image you want. It uses any DVD codecs installed so visual and audio quality will be the same with much more flexibilities. It even allows overlay control over those players that don't provide them (WinDVD for example doesn't let you control gamma). It's great. You can even mix and match the different codecs (video filter from Cinemaster for PQ and audio from WinDVD for DD/DTS passthrough--Cinemaster only does DD).
 

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Discussion Starter #7
Huey,


When you talk about Zoomplayer 2.12 being able to zoom or unzoom a DVD image I assume that this will not affect the size of the projected image. Wouldn't the projector itself still have to be zoomed out in order to maintain constant height for different aspect ratios?
 
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